Improvement in mash-rakes



.I; GUTHRIE.

' MASH-RAKE.

193,507. Patented July 24,1877.

M W a ATTORNEYJ;

N. PETERS. PHOTO-LITHOGRAFHERL'WASHXNGTONV D C ALEXANDER 1. GUT'IEIRIE, or Lemma, KENTUGKY.

IMPROVEMENT m MASH-RAKES.

Specification forming part of Letters Patent No. 193,507, dated July 24, 1877 application filed June 9, 1877.

To all whom it may concern:

Be it known that I, ALEXANDER I. GUTH- RIE, of Louisville, in the county of Jefferson and State of Kentucky, have invented a new and valuable Improvement in Mash-Rakes; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being bad to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.

Figure l of the drawings is a representation of a longitudinal vertical sectional view of my mash-rake, and Figs. 2 and 3 are details of the same.

The nature of my invention consists in the construction of a mash-rake whereby either steam or cold air can be conducted through the rake while it is in motion stirring the mash in the tub, as will be hereinafter more fully set forth.

The annexed drawings, to which reference is made, fully illustrate my invention.

A represents the mash-tub, provided with a hollow post, B, extending upward from the center of the bottom thereof. Through this post B is passed the center-shaft (J of the rake, which latter is composed of the head D and vertical teeth D depending therefrom.

The rake may be rotated by means of gearing connecting with the center-shaft O, or in any other suitable manner.

The rake-head D and teeth D are made hollow, the head being closed at both ends, and the teeth opening into the head. The front side of each tooth forms a central edge, a, and beveled sides b I), while the rear of the tooth is round, as shown at d. The lower end of the tooth is beveled or inclined, running to a point at the front, as shown at e.

By this construction the central edge a of each rake-tooth, and the beveled sides b b, together, form a wedge, which cuts into and divides the mash in the revolution of the rake, while the inclination of the lower end of each tooth, terminating in a point, allows ample space for the passage of steam, cold air, or

The upper face of the rake-head is perforated at o 0, and each perforation is screwthreaded to receive a screw, 8, and each perforation in the rake-head lies directly opposite the hollow in one of the teeth.

.By this construction the rake-head is steamtight on its upper face, when the screws are inserted in place, and, in cleaning the rake, should any of the mash adhere to the sides of the hollow tooth, it can readily be removed by taking out its screw and forcing a straight stick or other similar implement through the perforation, and thence through the hollow rake-tooth, removing any mash adhering to interior hollow of the tooth.

From the top of the rake-head D, at the center, extends a tube, E, upward into a box, G, formed on or attached to a beam, H, running above and across the center of the tub. Into this box is passed a tube, L, having two branches, P and R, which are provided with suitable stop-cocks P R.

Steam is forced through the pipes P. L into the box G, and from thence, through the tube E, into the rake-head D, and down through each rake-tooth D, discharging at the lower end thereof intothe mash while the rake is revolving. After steaming is sufficiently done the steam is shut off by means of the stop D, having the central cutting-edge a, beveled sides b b, and inclined lower end, terminating in a point, e, substantially as and'for the purpose set forth.

2. In a mash-rake, the hollow rake-head D, provided with screws 8 and perforations 0, in

line with the axes of .the hollow teeth D, substantially as described, and for the purpose In testimony that I' claim the above I have set forth. hereunto subscribed my name in the presence 3. In a mash-rake, having branch pipes P of two witnesses.

R tube L box G and tube E the hollow rake-head 1), having perforationso and screws ALEXANDER IVEBSON GUTH s, and the hollow teeth D, having central cut- Witnesses ting-edges a, and beveled sides I), all combined, JAMES G. GUTHRIE, for the purpose set forth. CHAS. WILSON. 

